Automatic stop for sound-reproducing machines



ZQELKELBARGER. AUTOMATIC STOP FOR scum) amonucme MACHINES. APPLICATION FILED JAN-12,1920- RENEWED MAR- 3.1922. 1 412 49 Patented Apr. 18, 1922.

2 SHEETS-SHEET I- Z. ECKELBABGER. AUTOMATIC STOP FOR SOUND REPRODUCING MACHINES.

APPLICATION FILED JAN- 12, I920- RENEWED MAR. 3,1922- Patented Apr. 18, 1922.

2 sums-sum 2.

Lnuentor:

mmmo

ii i fffig Zena ncnnnnnnenn, or

GOSHEN, INDIANA.

iniasio.

Specification of Letters Patent.

Patented aphid, 1922.

Application filed January 12, 1920, Serial No. 351,070. Renewed March 3, 1922. fierial No. 540,937.

T 0 all whom it may concern Be it known that l, ZENA EOKELBARGER, a citizen of the United States, residing in Goshen, county of Elkhart, Indiana, have invented certain new and useful Improvements in an Automatic Stop for Sound-Reproducing Machines, of which the following 18 a specification.

My invention relates to sound reproducing machines, otherwise known as phonographs, and especially to automatic stop mechanism for such machines.

The principal object of my invention 1s the production of an electrically operated automatic stop device for sound reproduc ng machines. Other objects of my invention are mentioned and described herein.

The preferred embodiment of my invention is illustrated in the accompanying drawings in whichlfigure 1 is a side elevation showing-a fragmentpf .a phonograph with my invention applied thereto; Fig. 2 is a plan view of the under; sideof the phof nograph top upon which my invention is mounted; and l 3' is'an enlargedplan view of the principal members of nly'invem tion.

Similar numerals of reference indicate like parts throughout the several'views on the drawings.

Referring tothe drawings the numeral 1 indicates a fragment of a phonograph frame top upon which ,the revoluble record carry-v ing table 2 is mounted at 3. Numeral a indicates a tone arm pivotally mounted in the tubular bearing member 5, the latter of which may have an arm 6 connected with the support 7 which is rigidly mounted in or upon the frame 1. The outer periphery of the tone arm 4 is provided with a projecting stop lug 8 adapted to engage devices, hereinafter described, to automatically stop the rotation of the record carrying table 2. The numeral 9 indicates a base plate which may be secured to the under side of the frame top 1 by one or more screws 10. Numeral 11 indicates an adjustment or timing member plate which may be segmental information and which may have the arcuate bearing apertures 12, 12, said apertures being engaged by the bearing and guide pins or screws 13, 1 3 secured in the base member 9 and upon which pins the member 11 is slidably mounted for circular movement. Normally the adjustment plate 11 is spring retracted by a coil spring 14 connected therewith at 15 and anchored to an upright arm 16 projecting from a brake pawl 17, the latter being pivotally mounted on the base member 9 at 18. The pawl 17 is provided with a curved outer periphery I 19 which engages the curved outer edge20 of the adjustment plate 11 and is yieldingly confined in such relation by a tension spring 21 anchored at 22 and suitably connected with the arm 16 of said pawl, thereby normally'causing said plate to be confined in any position to which it may be manually,

or otherwise,'moved. Numeral 23 indicates an arm projecting froinmember 11 and disposed in the path of movement of the lug 8 of the tone arm and 'by which it is adapted to be engaged as the tonearm moves across the face of the musical record, asiswell known in the art. 7 v

Numeral 2 1 indicates a lever memberfpivotally mounted at25 in the machine frame and from which a brake arm QGupWardly projects for braking against the record carrier table 2 for stopping same, The lever 24f may be provided with an arm 27 with which is connected a tension spring 28 for normally tending to effect engagementof the brake 26 with the table 2, which posi* tion of the lever is indicated bythe dotted lines thereof in Fig. 3. The spring 28jis connected at its opposite end with an insiilating member 29 which iscarried at 30 by a lever-31, disposed transversely oflever 24, which lever is pivotally mounted in the frame at 32, the spring mount 30 being intermediate the pivot point 32 and the end of the lever 31 to effect somewhat of adraft upon said lever. The lever 81 may have an extension 33 and a thrust plate 34 at the extremity of the latter, the lever eXtension 33 normally yieldin 'ly engaging one end ,of and within the strap like stop member 31 fastened to the frame at 31, 31", which engagement is effected by the spring 28.

The lever 31 is provided also with a hook or arm 35 which is adapted to engage the upstanding lug 36 carried by the lever 24, and is adapted to hold the latter retracted, thereby holding the brake member 26 disengagod from the table 2. The members and 36 serve also as an electric switch, as is hereinafter described. Numeral indicates an actuating arm carried by the lever 24; and provided "with the hammer or thrust 3 member 38 on its end, said member 38 being member 54 fand normally made of any suitable insulating material a'spring 43 connected with said pawl at 44 and, anchored at 45 in saidlever, effecting yieldable engagement thereof. v The lever 24-is provided with an extension 46v with which the link 47 is connected, the, opposite'end of said link being connected with the depending arm 48 of the lever 49,

whicharm is adapted to operate in the slot 50 formed in the frame member 1, said lever .49 be g surface of said frame member 1 at 51, where it is readily accessible for manual operation and, normally held-retracted by a spring 52.

Thenumeral 53 indicates an electromagnet adjacent; which the L shaped impulsion member 54 is resiliently mounted and carried byfa spring member 55 which normally holds the member 54 slightly spaced from themagnetcore 56. Numeral 57 indicates an impulsion head carried'on the end of the slightly spaced from the thrust plate 34, said head being made of any suitable insulating material. Numeral 58 indi'cates an electric battery, or any'suitable service of electrical energy orcurrent, one circuit wire 59'b'eing connected with the'magnet 53 and a ground wire (SO being connected with the'tone arm support 6, An electric circuit wire 61 is connected withthe lever 31 at its pivot 32, or o t her suitable position, and an electric circuit wire 62 connects the lever 24 adjacentits pivot-point 25, with the base plate 9 at 63. Obviously, the battery 58 may be dispensedwith and suitable connections may b9. made with any source of electrical current. 1,

.In operation, the lever 49 is swung to the left (on Fig.2 of the'drawing) to swing the switchlever 24 in the same direction. This movement of the lever 24 first engages the switch members35 and 36 and immediately thereafter disengages them as the lever ex.- tension 33 is stopped by the member 31 and as the swing of the lever 24 continues. Another efiect of the-described movement of the lever 24 is'to cause thepawl 40 to engage the brake pawl lug 16, thereby disengaging the .brakepawl 19 from the adjustment member 11 long enough to enable the spring 14 to effect. a full retractiv'e movement of the element 11 to the position indicated by the p'ivotally mounted on the upper' dotted lines thereof (see Figures 2 and 3), or until the guide pins 13 engage the op posite ends of the slots 12. In the meantime, the pawl 40 has tripped over the lug 16 of the pivoted pawl 17 and the latter has been retracted by the spring 21 until its braking face 19 again engages the face 20 of the plate 11. While the switch members 35 and 36 are held disengaged, the operator moves the reproducing needle of the machine across the face of the musical record to the interior limit thereof, which movement causes the tone arm 4 to partiallyrotate, thereby causing the lug 8 to engage the arm 23 of the member 11, whereby the latter is swung to the proper adjustment position and held there by the brake "pawl 17. Thereupon, the operator swings the tone arm 4 to the playing position, thereby disengaging lug 8 from the arm 23, and the operator thereupon releases the lever 49 which is retracted by the spring 52,.the lever 24 then being retracted by the spring 28 until.

the switch members35 and 36 again engage and close the electric circuit, whereby the brake-26is held disengaged from the rim of the record carrier. 2, which position of the lever 24, and members carried thereby, is indicated in Fig. 3 by the solid lines thereof.

When the playing of the musical record is finished the lug 8 of the tone arm body 4 engages the arm 23of the plate 11,'thereby closing an electric circuit through the switch members 35 and 36, the circuit wire 62 and members. 9 and 11 and member 6' and the wire 60' all of said elements being of any suitable conductor metal. Thereby, the

ido

magnet 53 is energized which attracts the member54, thereby projecting the ,hammer member 57 against: the member 34 of the. extension 33 of the lever 31, whereby the mem bers 35 and 36 are disengaged. Simultaneously-with the disengagementof the members'35 and 36, the member 38 of the lever arm 37 is impelled against the arm 39 of the lever 31 which impulsion continues until the lever 24 has been fully retracted bythe spring ,28 which is the position indicated in F ig. 3 by the dotted lines of said lever 24,

and whereby the lever 31 is impelled by arm 37 to the position indicated by the dotted lines thereof in Fig. 3 and disengagably confined therein by the arm 37, as described, in which position the members 35 and 36'are in spaced disengagement.

The effect of the projection of lever 31, as described, is to disengage thehook 35 of lever 31 from the lug 36 of lever 24 and the spring 28 at once throws the lever 24v into the position indicated by the dotted lines in Fig. 3, in Which position the brake 26 engages the record carrier table rim and stops the rotation thereof.

The preliminary retraction of the lever 24, as hereinbefore described, relieves the lever 31 of the impulsion of lever 37, thereby enabling the spring 28 tomove the lever 31 to the position indicated in Fig. 3 by the solid lines thereof, in which movement the members 34: and 57 are brought into close relation and stopped therein by the stop element 31.

I claim:

1. In an automatic stop for the record carrier of a sound reproducing machine, a tone arm; a brake for the carrier; means for releasably locking the brake in an inoperative position; an electrically controlled element for releasing the brake locking means; means for actuating said electrically controlled releasing element, said actuation being dependent upon a selectively determined position of the tone arm; cooperating electric switch members carried by said brake and said locking means; and means for holding said switch members spaced apart after release of said brake locking means.

2. In an automatic stop for the record carrier of a sound reproducing machine, a

tone arm; a brake for the carrier; means for releasably locking thebrake in an inoperative position; an electricallycontrolled element for releasing the brake locking means; means for actuating said electrically controlled releasing element, said actuation being dependent upona selectively determined position of the tone arm; cooperating electric switch elements carried by said brake and the brake locking means, said switch elements being normally urged toward each other; and disengagable means "for holding said switch elements spaced apart after release of said brake locking means. 7

3. In an automatic stop for the record carrier or a soundreproducing machine, a tone arm; a brake for the carrier; means for releasably locking the brake in inoperative position; an adjustment element movable semicircularly to a selectively determined position; and means operative upon impact of a portion of the tone arm with said adjustment element for releasing said locking means.

4:. In an automatic stop for the record carrier of asound reproducingmachine, a tone arm a brake for the carrier means for releasably locking the brake in inoperativeposition an adjustment element movable in an arc to a selectively determined position; and electrical means operative upon impact of a member actuated by the tone arm with said adjustment member for releasing said lockmg means.

5. In an automatic stop for the record carrier oi a sound reproducing machine, a tone arm, a brake for the carrier, means for locking the brake in inoperative position,

an adjustment member movable by means of the tone arm in one direction to a selec- ,see

' ment element for tively predetermined position, means for locking said adjustment member in selected position, and electrical means operative upon impact of a portion of the tone arm with said adjustment member for releasing said locking means.

6. In an automatic stop for the record carrier of a sound reproducing machine, a tone arm, a brake lever for the carrier, means for normally locking the brake lever in inoperative position, an adjustment member movable to a selectively determined position, means for locking said adjustment member in selected position, means associated With the brake lever for releasing said adjustment member locking means upon movement of the tone arm in' a predetermined direction, and means operative upon impact of the tone arm with the adjustment member for releasing said brake lever locking means.

7. In an automatic stop for the record carrier of a sound reproducing machine, a tone arm, a brake lever for the carrier, means fornormally locking the brake lever in inoperative position, an adjustment memsition; a retractable reciprocatory adjustment element movable to a selectively determined position; means operative upon impact of the tone arm with said adjustreleasing said brake looking means; and means operative subsequent to the operation of said means for releasing said brake locking means for automatically retracting said adjustment element.

9. In an automatic stop for the record carrier of a sound reproducing machine, a tone arm, a brake tor the carrier, means for locking the brake in inoperative position, a retractable adjustment member movable to a selectively determined position, means operative upon impact of the tone arm with said ad'ustment member for releasing said brake locking means, and means operative subsequent to the operation of said means for releasing said brake locking means for for locking the brake in inoperative position, operative subsequent to the operation of an adjustment memb'er movable to a, s l said means for releasing said brake locking 'tiv'ely determined position, means operative means. 10 upon impact of the tone arm With said ad- In testlmqny whereof a 'i i w justment member for releasing said brake aflamed y g a r @1115 18th ay Of 'Aulockin means and a spring for retracting gust, 1919. v e said adju'stmentmember, sa1d spring being ZENA ECKELBARGER. 

